They're dredging the harbour so that larger ships can use it.

他们正在疏浚港湾以便大船驶入。

The depth of the river is maintained by dredging.

通过疏浚保持河道的深度。

Now she was dredging up memories from the depths of her mind.

这时，她回忆起内心深处的往事。

Police have spent weeks dredging the lake but have not found his body.

警察已经花了几周时间在湖里打捞，但是仍未发现他的尸体。

The objective is to observe the clinical effect of Shuguanling (Chinese medicine for dredging the oviduct) on salpingemphraxis sterility.

为了观察疏管灵（一种疏通输卵管的中药）治疗输卵管阻塞性不孕症的临床疗效。